Exactly how secure clean air at your residence or office? The answer to this kind of question thanks researcher who resides probably the most polluted cities in the planet: Delhi. The problem of not enough clean air and touched him personally caused by allergies his lung potential decreased to 70%. With the help of NASA discovered the best way to ensure access to oxygen while living even in their normal polluted place like Delhi. The solution to your short lived problem is not found in other places than in nature. As it turns available, there are three ordinary houseplants, which are able to deliver human survival even within a tightly enclosed space!